CAJ | 학술논문

目的探讨改良单开门微型钛钉-钛板内固定的生物力学特性.方法选取8具无损伤的新鲜人尸体颈椎标本(C3-7),经分次处理后随机分为两组,每组4具标本20个节段:A组:于每个节段颈椎标本模拟单开门颈椎管扩大成形术,术中使用改良单开门微型钛钉-钛板固定;B组:每节段颈椎标本模拟同样手术操作,使用传统单开门钛钉-钛板(Centerpiece钉板)固定.应用MTS880生物材料实验机测试每个颈椎节段标本开门后再关门的最大负荷、完全关门时的负荷及功耗,并对两组结果进行比较.结果再关门过程中A组和B组的最大负荷平均分别为(873.61±154.40)、(297.17±133.41)N,完全关门时负荷平均分别为(812.98±141.79)、(145.77±59.21)N,功耗平均分别为(5.95±0.83)、(1.65±0.70)J,两组比较差异均有统计学意义(P＜0.05).结论模拟单开门颈椎管扩大成形术中使用新型改良单开门钛钉-钛板内固定的生物力学性能较传统单开门钛钉-钛板更好.
목적 탐토개량단개문미형태정-태판내고정적생물역학특성.방법 선취8구무손상적신선인시체경추표본(C3-7),경분차처리후수궤분위량조,매조4구표본20개절단:A조:우매개절단경추표본모의단개문경추관확대성형술,술중사용개량단개문미형태정-태판고정;B조:매절단경추표본모의동양수술조작,사용전통단개문태정-태판(Centerpiece정판)고정.응용MTS880생물재료실험궤측시매개경추절단표본개문후재관문적최대부하、완전관문시적부하급공모,병대량조결과진행비교.결과 재관문과정중A조화B조적최대부하평균분별위(873.61±154.40)、(297.17±133.41)N,완전관문시부하평균분별위(812.98±141.79)、(145.77±59.21)N,공모평균분별위(5.95±0.83)、(1.65±0.70)J,량조비교차이균유통계학의의(P＜0.05).결론 모의단개문경추관확대성형술중사용신형개량단개문태정-태판내고정적생물역학성능교전통단개문태정-태판경호.
Objective To evaluate the biomechanical performance of a modified miniscrew-plate fixation in the unilateral open-door cervical laminoplasty.Methods Eight specimens of cervical spine (C3-C7) were made from intact adult cadavers.After randomization into 2 groups, with 4 specimens and 20 vertebral segments in each group, the unilateral open-door cervical laminoplasty was performed in each cervical vertebra in both groups.In group A the modified miniscrew-plates were used while in group B the traditional miniscrew-plates were implanted.A MTS880 machine was used to test the maximal load of the reclosed open-door miniscrew-plate at each cervical vertebra, and the maximal load and energy of the completely closed open-door miniscrew-plate.Results In the reclosing process, the mean maximal load was 873.61 ±154.40 N in group A and 297.17 ± 133.41 N in group B.In the complete closing state, the mean maximal load was 812.98 ± 141.79 N in group A and 145.77 ±59.21 N in group B; the mean energy was 5.95 ±0.83 J in group A and 1.65 ± 0.70 J in group B.There were significant differences between the 2 groups ( P ＜ 0.05 ) .Conclusion The modified miniscrew-plate can have better biomechanical performance than the traditional miniscrew-plate in simulated unilateral open-door cervical laminoplasty.